Multiple Choice: Circle the ONE most appropriate answer for the following 1. (2
ID: 3325490 • Letter: M
Question
Multiple Choice: Circle the ONE most appropriate answer for the following 1. (2 pts.) Suppose that for the events A and B from the same sample space, P(A)-0.2 P(B) 0.6, and P(AUB)0.68. Which of the following statements are true? a. Events A and 8 are independent b. Events A and B are complements c. Events A and 8 are mutually exclusive/disjoint d. All of the above e. None of the above (2 pts.) A randomly selected sample of 400 students at a university with 15-week semesters was asked whether or not they think the semester should be shortened to 14 weeks with longer classes. Forty-six percent (46%) of the 400 students surveyed answered "yes." which of the following statements is true about the number 46% is correct? 2. a. It represents the margin of error b. It is a population parameter c. It is a sample statistic d. All of the above e. None of the above (2 pts.) If the average grade on an exam is 75% and the median grade is 60%, how would you describe the shape of the distribution of these exam grades? 3, a. Bimodal b. Skewed left c. Skewed right d. All of the above e. None of the aboveExplanation / Answer
1)as P(AnB)=P(A)+P(B)-P(AnB)=0.2+0.6-0.68=0.12
as P(AnB)=P(A)*P(B) therfore A and B are independent
optionA is correct
2)option C is correct
3)
optionC as mean is higher than median
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